US Bridges

CO RD NW 600 over N Fk Blackwater Rv

Good

Johnson County, Missouri · S 21 T 47 N R 27 W · Structure no. 14279

Built
1993
32 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
163 ft
3 main spans
Daily traffic
110
2023 count
Owner
County
County Highway Agency

About this bridge

CO RD NW 600 over N Fk Blackwater Rv is a prestressed concrete stringer/multi-beam or girder carrying CO RD NW 600 over N Fk Blackwater Rv in Johnson County, Missouri. It was built in 1993, so it is 32 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 110 vehicles a day, roughly 10% of them trucks, projected to reach 176 by 2043. The structure is 163 ft (49.7 m) long and 26 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCO RD NW 600
CrossesN Fk Blackwater Rv
LocationS 21 T 47 N R 27 W
RouteCounty Highway 62
CountyJohnson County
StateMissouri
Coordinates38.85525, -93.90121
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating52.6 US tons
Inventory rating36.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length163 ft (49.7 m)
Longest span55 ft (16.8 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic110 (2023)
Projected traffic176 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was CO RD NW 600 over N Fk Blackwater Rv built?

It was built in 1993, making it 32 years old in 2025.

What condition is CO RD NW 600 over N Fk Blackwater Rv in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2024.

How much traffic does CO RD NW 600 over N Fk Blackwater Rv carry?

About 110 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is CO RD NW 600 over N Fk Blackwater Rv?

The structure is 163 ft (49.7 m) long with a longest span of 55 ft (16.8 m) and a deck 26 ft wide.

Who owns CO RD NW 600 over N Fk Blackwater Rv?

It is owned by the County Highway Agency.